Grinding-wheel stand.



E. P. ALEXANDER.

GRINDING WHEEL STAND.

APPLICATION FILED APR.2I.1916.

Patented May 22, 1917.

' 2 SHEETS-SHEET I.

Inventor Witnesses Attorneyso c n N m c m N s s Pris: co., Puomumm w E. P. ALEXANDER.

GRINDING WHEEL STAND.

APPLiCATION FILED APR.27, 191s.

Patented May 22, 1917.

2 SHETS-SHEET 2.

lnventog,

Wi'tness es Attorneys E n N w W M s m o m w a N P w u m w m a N EMF @ATEd PATENT @FFKQE.

ELIVIER 1?. ALEXANDEB, 0F LEWISTOWN, PENNSYLVANIA, ASSIGNOIB. T0 JAMES H.

MANN COMPANY, OF LEWISTOWN, PENNSYLVANIA.

GRINDING-WHEEL srANnJ Specification of Letters Patent.

Application filed April 27, 1916. Serial No. 93,956.

To all whom it may concern:

Be it known that I, ELMER P. ALEXANDER, a citizen ofthe United States, residing at Lewistown, in the county of Mifiiin and State of Pennsylvania, have invented a new. and useful Grinding-Wheel Stand, of which the following is a specification.

The device forming the subject matter of this application is a grinding wheel stand, and one object of the invention is to provide novel means whereby the grinding wheel is so mounted that it will not vibrate, it being a matter of common knowledge that if a grinding wheel vibrates, it soon loses its shape and requires frequent truing.

Another object of the'invention is to provide a means for caring for the dust.

A further object of the invention is to provide a machine of the type above mentioned, which is equipped with a hood and with a tool support, adapted for interchangeable mounting in operative relation to the grinding wheel.

The invention aims to improve the tool support above mentioned.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description pr0 ceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in rear elevation, a grinding wheel stand constructed in accordance with the present invention, the hood being turned up and being disposed in operative relation to the grinding wheel;

Fig. 2 is a rear elevation wherein the hood has been shown as swung downwardly, away from the grinding wheel, the tool rack or support being adjusted to a position adjacent the grinding wheel;

Fig. 3 is a side elevation; and

Fig. 4 is a longitudinal section wherein parts appear in elevation.

In carrying out the present invention there is provided a hollow base 1 including a top 2 defining a compartment 36. The hollow base 1 is provided with a clean out door 3 which may be held in place removably by any suitable means indicated at l. Projecting from the base 1 and located opposite to'the door 3 is an elbow 5 constituting a part of theconduit whereby dust is carried to the compartment'36. Assembled with the base 1 and constituting an outlet for the compartment 36 is a pipe 6 which preferably discharges outside of the building wherein the machine is located, the pipe being adaptedto carry away'the lighter portions of the dust and detached material. Fixed to and rising from the top 2 of the hollow base 1 are standards 7 provided with bearings 8 in which is journaled a substantlally horizontal shaft 9 equipped with a pulley 10 adapted to receive a driving belt 11. Any suitable means may be provided, however, for rotating the shaft 9. Fixed to the shaft 9 and located between the stand ards 7 and the bearings 8 is-a grinding wheel 12. Especial attention is directed to the fact that the grinding wheel 12 is located between the standards 7 and 1s supported thereby. The wheel, located as above described, will be bound to run steadily and without vibration, and, in this respect, it is to be distinguished clearly from a wheel of a like sort, mounted on one end of a shaft, a wheel located as last above mentioned, being subject to vibration which necessitates frequent truings of the wheel, and renders such truings difficult to be carried out.

Partially inclosing the grinding wheel 12 is a hood denoted generally by the numeral 145. The hood 14: includes side walls 15, a combined back and top 16 and a relatively short front wall 17, the front wall 17 00- operating with the lower portions of the side walls 15 and the member 16 to define a reduced neck 18 at thelower end of the hood. Secured to the neck 18 is a collar 19, and by means of a hinge'QO, thecollar 19 is attached to the elbow 5. The collar 19 rests on the upper end of the elbow 5, as shown in Fig. 4. When the hood 1% is disposed in operative relation to the grinding wheel 12, it partially shields the same, in a manner which will be obvious when the drawings are examined. Owing to the presence of the hinge 20, it is possible to swing the hood 1a backwardly away from. the grinding wheel into the position shown in Fig. 2. This operation is carried out when it is sought to use a tool rack which will. be described hereinafter, Fig. 2 being noted at this point, for a transient understanding of the operation above mentioned. The hood 14 includes a vertical swinging deflector plate 21 located between the side walls 15 of the hood. The lower end of the deflector plate 21 is hinged as shown at 22 to the upper end of the front wall 17 of the hood. The upper end of the deflector plate 21 may be swung backwardly and forwardly, for adjustment, so that it will cooperate with the peripheries of grinding wheels of different sizes, or with a single grinding wheel as the latter wears away. The function of the plate 21, obviously, is to deflect downwardly from the grinding wheel 12, the dust and detached material. In order to hold the deflector plate 21 in adjusted positions with respect to the grinding wheel 12, the deflector plate is equipped upon its outer edges with laterally projecting studs 23 mounted to move for adjustment in arcuate slots 2% fashioned in the side walls 15 of the hood 14. Wing nuts 25 are threaded onto the ends of the studs 23 and coact with the side walls 15 to hold the deflector plate 21 in adjusted positions.

It is shown in Fig. 2 that the hood it may be swung away from the grinding wheel 12 in order that a tool rest or support may be disposed adjacent the grinding wheel. This tool rest structure will now be described.

Projecting from the base 1, as shown best in Figs. 2 and 3 is a bracket 26 provided at its upper edge with a socket 27 receiving fixedly a shaft 28. The numeral 29 indicates an arm mounted to swing on the shaft 28 at right angles to the axis of the shaft. The arm 29 is provided at one end with yieldable jaws 3O surrounding the shaft 28. A screw 31 connects the jaws 30 and by tightening up the screw, the arm 29 may be held in any position to which it may have been swung, vertically, and transversely of the axis of the shaft 28. Adjacent its free end, the arm 29 is supplied with a guide, preferably taking the form of a slot 32. The numeral 33 indicates a tool rest adjustable longitudinally of the arm 29, the tool rest including a stem 34 movable in the slot 32. A nut 35 is threaded onto the stem 34 and coacts with the arm 29 to hold the tool rest 33 in adjusted positions longitudinally of the arm 29.

In practical operation, the dirt and de tached particles produced during the grinding operation are received 1 1 and pass downwardly through the neck 18 and through the elbow 5 into the hollow base 1. The heaviest particles settle to the bottom of the compartment 36, and may be removed at any time through the door 3.

within the hood I The lighter portions of the detached material are sucked away through the outlet 6 and are discharged outside of the building wherein the present grinding mechanism is located. Owing to the relations existing between the grinding wheel 12 and the hood 14:, the wheel serves to create a more or less marked down draft through the neck 18 and the elbow 5. The function and utility of the deflector plate 21 has been alluded to hereinbefore, but it may be stated at this point that the deflector plate, owing to the provision of the hinge 22 and the clamping means 2325 may be adjusted so that the upper end of the deflector plate will cooperate properly with the periphery of the grinding wheel 12.

If it is desired to dress or true the grinding wheel 12, the hood 14 is swung into the position shown in Fig. 2, the screw 31 is loosened, thus releasing the hold of the aws 30 on the shaft 28, whereupon the arm 29 is swung over into the position shown in Fig. 2, thus disposing the tool rest 33 in operative relation to the grinding wheel 12, the screw 31 being tightened up to hold the arm in position. The tool rest 33 may he slid longitudinally of the arm 29 because the stem 34: of the tool rest is mounted to move in the slot or guide 32 of the arm. The nut 35 constitutes a means for holding the tool rest 33 in adjusted positions, longitudinally of the arm 29. By swinging the arm 29 vertically on the shaft 28, the tool rest 33 may be raised and lowered, and by moving the tool rest 33 longitudinally of the arm 29, the tool rest may be positioned properly with respect to the vertical median plane of the grinding wheel 12. The tool rest 33, therefore, has a wide range of adjustment with respect to the grinding wheel 12.

Having thus described the invention, what is claimed is 1. A grinding wheel stand including a hollow base provided at one side with an inlet; a hood carried by the inlet; a grinding wheel journaled on the stand and shielded by the hood; an upstanding deflector hinged at its lower end to the hood and adapted at its upper end to cooperate with the periphery of the wheel, the cleflector being movable at its upper end toward and away from the periphery of the wheel; and means cooperating with the deflector and with the hood for holding the upper end of the deflector in adjusted positions with respect to the periphery of the grinding wheel.

2. In a device of the class described, a stand; a grinding wheel journaled thereon; a hood hinged to the stand for swinging movement toward and away from the wheel in a direction parallel to the plane in which the wheel rotates; and a tool rest mounted to swing on the stand into and out of operatacle for material detached from the wheel by the tool on the rest, when the hood is swung backwardly away from the wheel.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signa- 15 ture in the presence of two witnesses.

ELMER P. ALEXANDER. Witnesses:

FRANK E. MANN, H. C. BURKETT.

Gopies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

' Washington, D. G. 

